C# 绑定DataGridComboxColumn SelectedIndex

我知道以前有人问过这个问题。我正在检查是否有新的聪明的解决方案。是否有更好的方法来绑定

DataGridComboxColumn

的

SelectedIndex

？这就是我在谷歌搜索了很多次后，如何让绑定工作的原因：

<!-- This is a little ridiculous -->
<DataGridComboBoxColumn Header="Batch Type"
    ItemsSource="{Binding Source={StaticResource methodOfPaymentItemsProvider}}">

    <DataGridComboBoxColumn.ElementStyle>
        <Style TargetType="ComboBox">
            <Setter Property="SelectedIndex" 
                    Value="{Binding MethodOfPayment, 
                                    UpdateSourceTrigger=PropertyChanged}" />
        </Style>
    </DataGridComboBoxColumn.ElementStyle>
    <DataGridComboBoxColumn.EditingElementStyle>
        <Style TargetType="ComboBox">
            <Setter Property="SelectedIndex" 
                    Value="{Binding MethodOfPayment, 
                                    UpdateSourceTrigger=PropertyChanged}" />
        </Style>
    </DataGridComboBoxColumn.EditingElementStyle>
</DataGridComboBoxColumn>

---

这是绑定SelectedIndex、ItemSource和DataGridComboxColumn的最佳答案

<DataGridComboBoxColumn Header="Batch Type"
  ItemsSource="{Binding Source={StaticResource methodOfPaymentItemsProvider}}">

  <DataGridComboBoxColumn.ElementStyle>
    <Style TargetType="ComboBox">
        <Setter Property="SelectedIndex" Value="{Binding MethodOfPayment,  UpdateSourceTrigger=PropertyChanged}" />
        <Setter Property="ItemsSource" Value="{Binding Streets, RelativeSource= {RelativeSource FindAncestor,AncestorType=UserControl}, Mode=OneWay}"/>
        <Setter Property="IsReadOnly" Value="True"/>
    </Style>
 </DataGridComboBoxColumn.ElementStyle>
 <DataGridComboBoxColumn.EditingElementStyle>
    <Style TargetType="ComboBox">
        <Setter Property="SelectedIndex" Value="{Binding MethodOfPayment, UpdateSourceTrigger=PropertyChanged}" />
        <Setter Property="ItemsSource" Value="{Binding Streets, RelativeSource={RelativeSource FindAncestor,AncestorType=UserControl}, Mode=OneWay}"/>
     </Style>
 </DataGridComboBoxColumn.EditingElementStyle>
 </DataGridComboBoxColumn>